Ear phones



Jan. 15, 1929. 1,699,127l

` G. w. wAcKER 4EAR PHONES Original Filed Aug. 17. 1925 INVENTOR www www* m@ Patented Jan. l5, 1929.

UNITED STATES PATENT OFFICE.

`encuen W. WAQKEB, 0F NORTH BERGEN TOWNSHIP, WEST HoBoKEN, NEW maggy", Assroivon To THE TAL RADIO COMPANY, INC., or NORTH BERGEN, NEW JERSEY, A

CORPORATION 0F ,NEW JERSEY.

EAB PHONES.

Original application ed August 17, 1923, Serial No. 657,905. Patent No. 1.603,431, datedOctober 19,

1926. Divided and this application filed July 21,

This application is a division of application Serial No. 657,905, tiled August 17, 1923, for ear phones, patent for which was granted on October 19, 1926, No. 1,603,431. The present divisional application directed generally to the manner in which the .ear phone is supported from a head baud, whereas the aforementioned patent is specifically directed .to the construction of the ear phone itself.f

This invention relates to ear `phones of the type which are now in general use for the reception of wireless telegraphic or telephonie communications, although the phones are equally adaptable for use on ordinary telephonie communications when the coils therein are properly modified for the reception of waves for lower frequency and coordinately relates to the manner of supporting said phones in position on the head.

In general the object of this invention is to provide a. cheap but very eiiicient receiver. In the receivers of this type it is customary to manufacture the same so that they may be adjusted longitudinally7 along af strap passed over the head of the wearer called the head band and it has also been found desirable to pivot the phone so that they may conform readily to the configuration of the ear and to fit snugly thereagainst so as to eliminate sounds external that which are received through the "ear phone. An-

other obiect of my invention therefore is to provide ready means for adjusting the car phone or receiver longitudinally along the head band.

A still further object of my invention is to provide means so that the receiver may readily adjust itself angularly with respect y to the head band. It has been found in some pivotal constructions of the receiver that the hair is apt to catch in the pivots, to the annoyance of the wearer of the receiverand so it is a further object of my invention to so construct the receiver that the catching of hair within the pivot will be reduced to a minimum. A further object of my invention is to construct the receiver, so that the same may be readily assembled, will be of a minimum number of parts and will have a minimum amount of material therewithin. Other and further objects of this invention willv be apparent after reading the 1926. serial` No. 126,873.

specilication when taken in connection lwith the drawings in which Fig. 1 is a view of my receiver as mounted on the head band.; i i

Fig. 2 a cross section through one oit' the receivers laken .on the line y2-2 of Fig.` 1;

Fig. 3 is a view of the back of one of the receivers, a portion thereof being shown in section; i

Fig'.` 4 is a view of some of the portions within the shell of the receiver; and i Fig. 5 is a fragmentary view of a modified form of my receiver. i

Now referring to the figures more in detail, 1 represents the head band upon both ends of which are shown as mounted the receivers 2 and 3 which are duplicates of eaeh other. The receivers each consists of a non magnetic shell 4 made up of some such material as brass, which is preferably struck or drawn out by a. machine so as to provide a cup shaped shell, the upper .or open position of the `cup bei-ng bent so as to provide a ledge 5 on which is adapted to rest the ordinary diaphragm 6 as will be readily understood by those skilled in the art. In order to hold this diaphragm in place within the cup, an inverted saucer Ashaped non-magnetic resilient member 7 is laid upon the dfiphragm 6 the member 7 having an aperture 8 therethrough so as to permit the sound wave created by the diaphragm 6 to pass readily therethrough. It will be noted that this saucer shaped member presses upon the diaphragm (i only at its ciroumterencefand does notin any way interfere with or prevent the free vibrations of the diaphragm 6 due to the energization by the electric magnets in the cup. down towardthe members 6 is the ear `shell 9 which has an opening l() in alignment with the opening 8 in member i",` said ear shell beingr frictionally retained by the cup 4 at its flanged edge 11 as will be clearly understood by referring `to Fig. 2 of the drawings. The edge in the i opening 11 presses against the edgel of the opening 8 and thereby exerts its pressure upon the diaphragm 6 through the plate 7 to keep the diaphragm in its proper place, The member 7 may be eliminated by adopting the construction shown in Fig. 5 wherein the ear piece 12, which is equivalent to the car Pressing the members 7` piece 9 of Fig, 2, is trictionally held within the circumference of the flange 11 and presses directly upon the diaphragm 6.

lWithin the cup is a pair ot' eectromargnets 13 and lll each of which is provided with a pair of heads 15 and 16, between which heads is wound the coils ot the electromagnets. The core ot each of the electromagnets is a thin tlat plate ot sott magnetic material bent into the sha-pe ot an l. one limb 17 of which extends through the coil and heads ott the electromagnet and the other limb 3 oit which is in magnetic c intact with pole tips oi apermanent magnet 19 thereby t'orming pole pieces for the permanent magnet. The magnets in this instance are slunvn as composed ot a pair oit magnets 20 and overlapping cach other. For as is well known in the art, a laminated permanent magnet has greater strength than a, like magnet not so laminated.

As means for supporting the receiver to the head band, a support is fastened to the back of the shell of the receiver, such support comprising a pair ot non-magnetic ears 22. These ears 22, the permanent magnets 2O and 21 and the pole pieces are secured to the bottom of the shell by means of preterably non-magnetic screws l passing there through, thus securely binding them together. The ears 22 are provided with the registering apertures 23 within which are re ceived the narrowed ends 27 ot a pair of flat springs 26, the wider paris of each ot which is slightly longer than the distance between the two apertures 23. The narrowed tabs 27 extend from these wider parts through the aperture 23.

As will be obvious the springs 26 w ien positioned within the ears 22 with the ci;- tension 27 in the apertures 23 will be caused to assume the bowed condition illustrated in 2, due to the tact that the length of the widened portion ot the spring 26 is greater than the distance between the ears 22. The spring 2G will be spaced a substantial dise lance apart adjacent the apertures 23 which spacing gradually decreases toward the ccn ter. One of the ends ot the head band 1, can therefore be readily positioned between and gripped by the plates 2G, by inserting a corner between the plates at a point adj acent the openings 23 where the spacing between the plates 2G is the greatest and then moving the band to a position intermediate the ear-s 22 as clearly shown in Fig. 2, in which position a very substantial Ylrictional gripping action ot' the head band b y the spring members 26 will be attained. By the employment ot this character of retaining means, it will be readily apparent that the receiver may be slid along this head band and yet trictional-lyretained in place at any ad- 'justed position so that the wearer thereof may by merely pressing against the receiver needle? move the same up and down along the head band to conveniently adjust the receiver to his ear. Furthermore, due to the bowed character of the springs the receiver may be tilted in a plane at right angles to the head band, so that the receivers may adjust themselves to the ear in a plane rotating about the axis ot the head band. The ear phones 2 and 3 in Fie'. 1 can furthermore be given a variation about a horizontal anis because oit the tact that the end 1 ot the head band and the spring plates 26 can be rotated as a unit within the apertures 23.

For the purpose of maintaining the two spring members 26 as a unit and at the salmo time for preventing the ends thereof from cutting the ears 22 at the openings 23 and trom catching in the hair ot the wearer, l provide the bushings 24 as clearly shown in Figs. 2 and 3 in which bushings are received the narrow extensions 27 ot' the members 2G and Awhich bushings in return are snugly received within the apertures 23.

It will be noted that practically the whole of the receiver is metallic structure so that with the exception of the coils no molding has to be done to manufacture the receiver, thereby eliminating a chief source ot expense. The ear piece, the cup, diaphragm and the resilient member 7 as well as the ears 22 can all be struck up by a machine at a very small cost, while the other parts may loe also manufactured very cheaply.

To permit of a still further relative angular variation of each of the ear phones 2 and 3 with reference to each other and to the head olf the wearer, l arrange that the head band 1 shall be made up ot the sec tions and 31 pivoted vertically at 32 as shown in Fig. 1.

It will be understood that by my invention, I provide a receiver in which the ear phones are in a sense attachments to the head band and readily separable therefrom, and in which the means for attaching the ear phones to the head band are also separable means olf such a character as to require no modication ot the head band ior the proper association of the parts. its a result ot this, the parts ot the receiver are readily adjustable and replaceable, and the receiver is complete with either one or two ear phones.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is z- 1. A telephone receiver, a head band theretor and a pair ot resilient straps bowed toward each other intermediate their ends and engaging said head band and adjustably and pivotally securing said receiver to said head band.

2. A telephone receiver, a head band therefor and means for adjustably and pivotally securing said receiver to said head band comprising a support immovably secured to seid receiver, a pair of springs bowed toward euch other and pivotaily mounted in seid support.

A telephone receiver, a head band there for and means for pivotally securing said receiver to said head band comprising e support, a pair of bushings rotatably mounted in said support and a head band gripping member mounted in said bushings.

4. A telephone receiver and means for udjustubly and pivotally securing said receiver to a head band comprising a pair of upertured members secured to said receiver, bushings rotatably mounted in said members and a pair of :fiat springs bowed toward each other snapped into place in said bushings. i

In Witness whereof, I have hereunto signed my name.

` GEORGE W. WACKER. 

